So, by way of the ocean currents, the impact would initiate a long-term cooling.

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This would be in addition to a much less theoretical short-term cooling caused by smoke from the fires and dust thrown into the atmosphere by the impact.

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"No nuclear power plant has ever considered the inability to get on long-term core cooling for more than a week, much less three weeks, " Friedlander said.

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Additionally, the LaCie 5big's advanced dual cooling system ensures long-term reliability by preventing overheating.

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Although sulfate particles may have had the short-term effect of cooling temperatures, in the long run, pumping CO2 into the atmosphere spells trouble.

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The climate may further cool if additional natural long and short-term cycles also enter into cooling phases.

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The theory is that higher shortterm rates inhibit lending and investment, helping to precipitate the slowdown, while the low long-term rates anticipate a later cooling of demand for borrowed money.

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Mr. JOE GEEVER (Spokesman, Surfrider Foundation): We're concerned about, you know, one that the desal may extend the life of these once-through cooling systems or, in the short term, exacerbate how much marine life mortality is going on right now.

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Mariela's post-cooling MRI looked normal, which suggested she wouldn't have any long-term cognitive problems due to the lack of oxygen, according to Ms. Peloquin.

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Just such an aerosol effect is believed to have disrupted the Earth's thermal balance during the Laki event, cooling some Northern Hemisphere regions by as much as 1 or more degrees Celsius below the long-term average.

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